[tex-live] oversimplyfied test for lzmadec existence

[Karl Berry]

    $ tlmgr arch list
    Use of uninitialized value in concatenation (.) or string at /opt/texlive/2008/bin/i386-netbsd/tlmgr line 1819, <TMP> line 4977.
    no binary of lzmadec for  detected.

Sigh.  I thought we had fixed that so that a reasonable error message
was given.
    
    (BTW, why -r instead of -x?)

Because of DVD's getting mounted with noexec.

    The attached patch changes this behaviour (in a backward compatible way,
    of course ;-)) to try to run the program even if the absolute path is
    not given.

Is there any other feasible way for you to solve it?  E.g., by copying
your binaries into place?  I remember we discussed it earlier, but I
don't know where it stands now.

We certainly want to make it easy for you to package up TL for netbsd.
But running lzma[dec] from PATH seems pretty dangerous.

karl